我是CodeIgniter的新用户并且在将数据库添加到会话数据时遇到了添加用户ID(用户登录后)的问题,这是我的代码问题可能会在SOF之前询问,在我付出所有努力之后我会问这个
//登录模型
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Login_model extends CI_Model
{
function __construct()
{
// Call the Model constructor
parent::__construct();
}
//get the username & password from tbl_usrs
public function get_user($usr, $pwd)
{
$sql = "select * from tbl_usrs where username = '" . $usr . "' and password = '" .$pwd . "' ";
$query = $this->db->query($sql);
return $query->num_rows();
}
/* public function set_session($username) {
$sql="SELECT * FROM tbl_usrs WHERE username='".$username."' LIMIT 1 ";
$result=$this->db->query($sql);
$row=$result->row();
$sess_data=array (
'id'=>$row->id,
'username'=>$username,
'is_login'=>TRUE
);
$this->session->set_userdata($sess_data);
} //set_seesion function ends
*/
}
?>
//登录控制器
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
print_r( debug_backtrace() );
//ini_set('memory_limit', '-1');
//ini_set('max_execution_time', 3000);
ini_set('display_errors',1);
error_reporting(E_ALL);
class LoginController extends CI_Controller
{
public function __construct()
{
parent::__construct();
$this->load->library('session');
$this->load->helper('form');
$this->load->helper('url');
$this->load->helper('html');
$this->load->database();
$this->load->library('form_validation');
}
public function index()
{
//load the login model
$this->load->model('login_model');
// $qry=$this->login_model->validate();
//get the posted values
$username = $this->input->post("username");
$password = $this->input->post("password");
$user_id = $this->input->get("user_id");
//set validations
$this->form_validation->set_rules("username", "username", "trim|required");
$this->form_validation->set_rules("password", "password", "trim|required");
if ($this->form_validation->run() == FALSE)
{
//validation fails
redirect('Homecontroller/index'); //make new controller for loading a form again
echo "Validation fails"; // even for no name and passwrd
}
else
{
//validation succeeds
if ($this->input->post('submit') == "Login")
{
//check if username and password is correct
$usr_result = $this->login_model->get_user($username, $password);
if ($usr_result > 0) //active user record is present
{
//set the session variables
$sessiondata = array(
'user_id' => $user_id,
'username' => $username,
'password'=>$password,
'is_login' => TRUE
);
//$this->login_model->set_session($username);
$this->session->set_userdata($sessiondata);
print_r($this->session->all_userdata()); //to check
redirect(base_url("Site/member_area"));
return $username;
}
else
{
$this->session->set_flashdata('msg', '<div class="alert alert-danger text-center">Invalid username and password!</div>');
redirect('Homecontroller/index');
}
}
else
{
redirect('login/home3');
}
}
}
}?>
当我尝试在视图中打印会话数据时,我收到user_id =&gt;空
答案 0 :(得分:0)
这些变量都不可用于作业:
'user_id' => $user_id,
'username' => $username,
'password'=>$password,
原因是您使用过:
$usr_result = $this->login_model->get_user($username, $password);
但是,这只会是返回行数的结果:
public function get_user($usr, $pwd)
...
return $query->num_rows();
现在,$usr_result
将是返回的行数,而不是相关用户的数据。
因此,您应该做的是将该登录函数中的会话数据设置为return $query->num_rows();
以上$query=
以上。
public function get_user($usr, $pwd){
....
$query = $this->db->query($sql);
$this->session->set_userdata('sessiondata', $query->row_array());
}
请注意,由于我们只从查询中检索到1个用户,因此我们也只想获得1行。此外,您希望存储关联数组,而不是对象,因此我们使用$query->row_array()
将1 row
格式化为array
,其中key
是列名称和值是列结果。
现在,执行echo '<pre>', print_r($this->session->userdata('sessiondata'), true),'</pre>';
以获取包含该数组的该对象的格式化列表。然后,您可以相应地映射名称。
Sidenote,我不会将密码存储在会话中。